Harness stop motion for looms



J. DURS 1,959,232

2 Sheets-Sheet 1 May 15, 1934.

HARNESS STOP MOTION FOR LOOMS Filed June 1, 1952 May 15, 1934. J u s HARNESS STOP MOTION FOR LOOMS 2 Sheets-Sheet 2 Filed June 1, 1932 Jam es Du 7 s Patented May 15, 1934 PATENT OFFICE HARNESS STOP MOTION FOR LOOMS James Durs, Allentown, Pa.

Application June 1, 1932, Serial No. 614,783

7 Claims.

This invention relates to stop means for looms and particularly to means actuated upon a break in the heddle harness or allied parts whereby to cause the closing of a circuit to the usual electrically actuated stop motion mechanism.

There are various parts on a loom which are connected to or form part of the heddle harness, which, if they break, cause the harness to fall. Thus, for instance, the small brace on the dobby arm may break or a wire supporting the harness wear and break in any one of three places. The mount cords or rings may break or the hooks on the harness and the strings joining the mount cords may break. When this happens, these parts are likely to fall into the warp between the harness or between the reed and harness, causing flaws, ripping and start marks and smashes.

The general object of the present invention is to eliminate this trouble, save work and time for the weaver and make better cloth by providing mechanism which, when any part of the harness breaks, will immediately stop the loom.

A further object is to provide a mechanism of this characterwith which the harness cords or wires are engaged, which, when released by a breakage of the harness cords or wires, will immediately be shifted to a position to closea circuit through the ordinary electrical stop motion mechanism. 1

A further object is to provide a device of this character which is mounted upon the upper arched frame elements of the loom so as to be entirely out of the way and so as not to interfere with any other part of the loom and another object is to provide a device of this character which may be adjusted to fit any dobby loom or any loom wherein the heddles are supported by wires or cords.

My invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a fragmentary front elevation of a portion of one of the arched frames of the loom and of one of the heddles showing my mechanism applied to this arched frame, the parts of my structure being shown in section;

Figure 2 is an elevation of my invention, the arched frame elements of the loom being shown in section;

Figure 3 is a perspective view of the means for supporting the electrical contact bars and Figure 4 is a perspective view of one of the bars through which the circuit closing plungers pass.

Referring particularly to Figures 1 and 2, A designates the arched frame elements of the loom, these frame elements extending over the provide an eye 24 through which one of the wires body of the loom and carrying upon them the pulleys B over which the harness cords or wires pass. 0 designates one of the usual harness frames. One of the dobbies is designated D. The harness cords E are shown as connected to the db harness wires F in advance of the pulleys B, the harness wires being connected to the dobby by means of a wire loop G. The harness cord E for the right hand end of the heddle C is connected to the wire F. 5

It will thus be seen that this wire F will be under tension so long as the cords E are unbroken and so long as the hooks engaging the heddles C with these cords E are unbroken. In order to close an electric circuit in case the wires F or the cords E or these hooks e should break, I provide the two opposed uprights 10 which are bolted or otherwise attached to the frame elements A by means of the bolts 11. These uprights 10 are vertically slotted at 12, the slot commencing below is the upper end of each upright and extending downward nearly to the lower end of the upright. Through the upper end of the upright passes a bolt 13.

Adjustably mounted upon each upright 10 are the supporting brackets 14 which are held in adjusted position by the bolts 15 extending through the slots 12. These brackets support a pair of transverse guide bars 16 and 17, one of which is shown in perspective view in Figure 4. These guide bars at their extremities are longitudinally slotted at 18 for the passage of bolts 19 which extend upward through the slots 18 and extend through the extremities of the brackets 14 as shown in Figure 2. Preferably these bars 16 have o horizontal portions, these end horizontal portions carrying the slots 18, but the middle portion of each bar is inclined upward and toward one end of the bar as shown clearly in Figures 2 and 4. The bars 16 and 17 are formed with a plurality of apertures 20 at least equal in number to the number of dobbies on the loom, these apertures 20 being disposed vertically through the inclined middle portion of each bar 16 and 17.

Extending upward through the apertures 20 are a plurality of plungers 21 equal in number to the number'of dobbies and the number of harness frames, each plunger 21 having thereon an adjustable collar 22 against which a coiled compression spring 23 bears, the compression spring bear-' ing against the lower bar 16 and urging the plunger upward unless the plunger is forcibly held downward. The spring is relatively light. The lower end of each rod or plunger 21 is formed to 1? passes. As illustrated, the eye 24 is relatively elongated and provided with the oppositely disposed rollers 25 between which the wire F passes. It will be seen that so long as the wire F which passes through any particular plunger is taut or nonconductive material and might be/made of,

wood. The horizontal portions of these brackets project out above the series of plungers 21 and support upon them two contact strips or bars 28 and .29 of relatively thin metal. The extremities of these bars, as shown in Figure '2, are reduced in width so that these extremities may be inserted in eyes 39 formed of convoluted metal strips as shown in vFigure l and thus these metal bars .28 and 29 will be supported by these metallic eyes 30. The reduced ends of the bars '28 or .29 will be :of such length as to accommodate elements A which are spaced apart difierent distances.

The bars 28 and 29 are connected in an electrical circuit with an electrical stop motion not shown .by means of the wires 31 and 32 which are engaged with theextremities of the metallic eyes '30. The upper end of each' plunger 21 carries upon it a metallic contact member 33 long-enough to bridge the space between the contact bars 28 and 29 so that when any particular plunger is forced upward by the spring '23, the circuit through the wires 31 and 32 will be closed and the circuit through the stop motion operating mechanism will be closed and the stop motion actuated. The angular brackets '26 are vertically adjustable upon the uprights 10 so as to bring the bars 28 and 29 in proper relation to thecontact or circuit bridging member 33.

Preferably the contact member 33 will be of copper and the contact bars 28 and 29 will also be of fiat sheet copper or brass having a thickness of approximately one-sixteenth of an inch and a width of aproximately one-half an inch. One of the contact bars, as for instance, the bar 28 will be connected tothe currentline and fastened to the usual warp or quill stop motion while the rear bars will be ground bars. These bars may be adjusted tothe correct width by pressing in ward on the clamps 30. When any of the bar'- ness wires break or slacken, the corresponding plunger will move upward connecting across the bars 28 and 29, thus causing a warp or quill stopoif switch lever (not shown) to fly up, contacting with knock-off rod on the lever of loom and stopping the loom. Obviously I do not wish to be limited to the number of plungers 21 which will be in accordance with the number of dobbies on the loom or number of heddles used. Neither do I wish to be limited to the details of construction as these might be modified in many Ways Without departing from the spirit of the invention as defined in the appended claims.- It will be noted from Figure 2 that the bars 16 and 1'7 are inclined upward and toward the rear of the loom. This is so that the transverse bars will not strike the main wires running in line toward'the back frame of the loom, these main wires being stop motion wires which are not illustrated. By having the vertical members 10 slotted, brackets 14 may be adjusted vertically so as to suit various makes of looms and obviously these main supports 10 may be adjusted toward or from each other to suit different makes of looms. The wire 32 is to be connected to either the quill stopofi line or the warp stop-off line. Nothing is connected with this contact 28 except the wire 32 and the contact 29 is to be grounded upon the frame of the loom.

I claim:-

' l. A stop motion attachment for looms comprising a frame having opposed uprights adapted to be engaged with the arches of a loom and extend upward therefrom, a pair of metallic transvversely spaced conductors supported upon said uprights and connected in a normally open circuit with :a source of current, a pair of bars looms comprising uprights having ineans whereby they may be connected to and supported on the frame arches ot a loom, a conductor mounted upon the upper ends of said uprights, said uprights engaging the conductor in a manner to permit the uprights to be adjusted nearer to or further from each other, the conductor being adapted to be connected in a normally open circuit with an electrically actuated stop motion, a pair of horizontal bars mounted upon said uprights for independent vertical adjustment thereon, the bars having alining apertures, a plurality of plungers mounted in said uprights, each plunger carrying at'its upper end a metallic member adapted when the plunger is raised to electrically engage said conductor and close a circuit through the stop motion, the extreme lower end of each plunger having an eye through which a harness wire may pass.

3. A harness wire stop motion attachment for slotted, brackets adjustably mounted in the slots of said uprights, an adjustable bracket mounted upon the upper end of each upright, means on looms comprising uprights adapted to be con- "nected to the frame arches of a loom and extend above the same, the uprights being vertically bars disposed below the conductors, each bar being slotted at its ends and adapted to be connected to a pair of the first named brackets, the horizontal bars having alining apertures, plungers mounted in said apertures, each plunger at its upper end having a contact member adapted when the plunger is raised to close a circuit through the conductors, the lower end of each plunger having an eye through which a harness cord may be passed, and springs for the plungers urging the plungers upward.

4. A harness wire stop motion attachment for looms including uprights adapted to be connected to the frame arches of a loom and extending above the same, upper and lower brackets, each mounted for independent vertical adjustment upon an upright, vertically adjustable brackets of insulating material mounted upon the upper end of each upright, each of the last named brackets having means for supporting thereon a pair of spaced conducting bars adapted to be connected in a normally open circuit with an electrically actuated stop motion, upper and lower horizontal guide bars disposed below the conductors, each bar at its ends being formed for adjustable engagement with the corresponding bracket, means for holding the brackets and bar in adjusted positions, the horizontal bars having alining apertures, plungers mounted in said apertures, each plunger at its upper end having a contact member adapted when raised to close a circuit through the conductors, the lower end of each plunger having an eye through which a harness cord may be passed, and springs urging the plungers upward.

5. A harness wire stop motion for looms including vertical members adapted to be mounted on top of a loom, a cross bar, independent means on each vertical member for adjustably supporting each end of said cross bar independently of the other end whereby the cross bar may be disposed at an inclination to the horizontal, a contact element carried by the vertical members and independently adjustable at each end whereby it may be disposed in parallel relation to the cross bar, a plurality of plungers mounted in and guided by said cross bar, each plunger having at one end a contact member adapted to electrically engage the first named contact element and close a circuit through a stop mechanism, and each plunger having an eye through which a harness cord may pass whereby to hold the corresponding plunger with its contact out of electrical engagement with the contact on the frame by the tension of said harness cord.

6. A harness wire stop motion for looms including vertical members adapted to be mounted on the arches of a loom, a plurality of cross bars disposed one above another, independent means on each vertical member for adjustably supporting the cross bars whereby the cross bars may be disposed at an inclination to the horizontal, a contact element supported by said vertical members at each end and independently vertically adjustable at each end whereby said contact member may be disposed in parallel relation to the cross bars, a plurality of plungers mounted in and guided by said cross bars, means urging each plunger in a direction toward the said contact element, each plunger carrying a contact member adapted to electrically engage the contact element and close a circuit through a stop motion, each plunger having an eye through which a harness cord may pass whereby to hold the corresponding plunger with its contact out of engagement with the contact element so long as the cord is under tension.

7. A harness wire stop motion for looms including vertical members adapted to be mounted on the arches of a loom, parallel cross bars carried by the vertical members and inclined upward from the front of the loom to the back of the loom, a contact bar disposed above the cross bars and paralleling the same and carried by said vertical members, a plurality of plungers mounted in and guided by said cross bars, the plungers being arranged in stepped relation to each other, each plunger being higher than the one in front of it, each plunger having at one end a contact member adapted to electrically engage the contact element to close a circuit through a stop motion mechanism, each plunger having an eye through which a harness cord may pass, and a spring associated with each plunger and acting to urge it upward toward the contact element.

JAMES DURS. 

